From the blog "Free Falling"

Bioshackles were genetically modified plants commonly used on Sixam - the most of ladies have been visiting shacklehouses from time to time for the unique pleasures. However, they couldn't be privately owned. As long as a short 4-8 hours sessions were safe, the longer ones could cause the loss of cognitive functions and temporary dementia. Reversible at  most, but there was a risk, so they were restricted to public, scientific and military purposes. One of them was flatlining the suspects to bre